engleski

Laboratory competence in scope of wine analytics established by interlaboratory comparison

Participation of laboratory in interlaboratory comparisons provides an objective assessment of measurement competency and reliability of produced results. The goals of interlaboratory comparison are various: verification of measurement quality, identification of the level of compliance between results of participating laboratories, assignation of certified values to reference material, method standardization and validation and exercise for knowledge and skills improvement. The aim of this work was to organize interlaboratory comparison for laboratories working in scope of wine analytics in the Republic of Croatia. In this interlaboratory comparison participated 31 laboratories: 6 with established quality assurance system (3 accredited according to standard 17025, 3 with certificate of technical competence), 9 laboratories from Universities, High schools and Research Institutes and 16 laboratories from wineries. Homogeneity and stability of prepared white wine sample was tested and statistically confirmed. The study included ten parameters: relative density, alcoholic strength, total dry extract, reducing sugars, ash, pH, total acidity, volatile acidity, free and total SO2. Participants used the methods of their choice. On the basis of obtained results, it can be concluded that laboratories working in scope of wine analytics are highly competent. Furthermore, excellent communication network of expertise and experience between participants is established.

interlaboratory comparison ; white wine

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